| Juergen Beisert | be4e119 | 2017-04-18 10:48:26 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/i2c.h> |
| 17 | #include <linux/of.h> |
| 18 | |
| 19 | #include "lan9303.h" |
| 20 | |
| 21 | struct lan9303_i2c { |
| 22 | struct i2c_client *device; |
| 23 | struct lan9303 chip; |
| 24 | }; |
| 25 | |
| 26 | static const struct regmap_config lan9303_i2c_regmap_config = { |
| 27 | .reg_bits = 8, |
| 28 | .val_bits = 32, |
| 29 | .reg_stride = 1, |
| 30 | .can_multi_write = true, |
| 31 | .max_register = 0x0ff, /* address bits 0..1 are not used */ |
| 32 | .reg_format_endian = REGMAP_ENDIAN_LITTLE, |
| 33 | |
| 34 | .volatile_table = &lan9303_register_set, |
| 35 | .wr_table = &lan9303_register_set, |
| 36 | .rd_table = &lan9303_register_set, |
| 37 | |
| 38 | .cache_type = REGCACHE_NONE, |
| 39 | }; |
| 40 | |
| 41 | static int lan9303_i2c_probe(struct i2c_client *client, |
| 42 | const struct i2c_device_id *id) |
| 43 | { |
| 44 | struct lan9303_i2c *sw_dev; |
| 45 | int ret; |
| 46 | |
| 47 | sw_dev = devm_kzalloc(&client->dev, sizeof(struct lan9303_i2c), |
| 48 | GFP_KERNEL); |
| 49 | if (!sw_dev) |
| 50 | return -ENOMEM; |
| 51 | |
| 52 | sw_dev->chip.regmap = devm_regmap_init_i2c(client, |
| 53 | &lan9303_i2c_regmap_config); |
| 54 | if (IS_ERR(sw_dev->chip.regmap)) { |
| 55 | ret = PTR_ERR(sw_dev->chip.regmap); |
| 56 | dev_err(&client->dev, "Failed to allocate register map: %d\n", |
| 57 | ret); |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | /* link forward and backward */ |
| 62 | sw_dev->device = client; |
| 63 | i2c_set_clientdata(client, sw_dev); |
| 64 | sw_dev->chip.dev = &client->dev; |
| 65 | |
| 66 | ret = lan9303_probe(&sw_dev->chip, client->dev.of_node); |
| 67 | if (ret != 0) |
| 68 | return ret; |
| 69 | |
| 70 | dev_info(&client->dev, "LAN9303 I2C driver loaded successfully\n"); |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int lan9303_i2c_remove(struct i2c_client *client) |
| 76 | { |
| 77 | struct lan9303_i2c *sw_dev; |
| 78 | |
| 79 | sw_dev = i2c_get_clientdata(client); |
| 80 | if (!sw_dev) |
| 81 | return -ENODEV; |
| 82 | |
| 83 | return lan9303_remove(&sw_dev->chip); |
| 84 | } |
| 85 | |
| 86 | /*-------------------------------------------------------------------------*/ |
| 87 | |
| 88 | static const struct i2c_device_id lan9303_i2c_id[] = { |
| 89 | { "lan9303", 0 }, |
| 90 | { /* sentinel */ } |
| 91 | }; |
| 92 | MODULE_DEVICE_TABLE(i2c, lan9303_i2c_id); |
| 93 | |
| 94 | static const struct of_device_id lan9303_i2c_of_match[] = { |
| 95 | { .compatible = "smsc,lan9303-i2c", }, |
| 96 | { /* sentinel */ }, |
| 97 | }; |
| 98 | MODULE_DEVICE_TABLE(of, lan9303_i2c_of_match); |
| 99 | |
| 100 | static struct i2c_driver lan9303_i2c_driver = { |
| 101 | .driver = { |
| 102 | .name = "LAN9303_I2C", |
| 103 | .of_match_table = of_match_ptr(lan9303_i2c_of_match), |
| 104 | }, |
| 105 | .probe = lan9303_i2c_probe, |
| 106 | .remove = lan9303_i2c_remove, |
| 107 | .id_table = lan9303_i2c_id, |
| 108 | }; |
| 109 | module_i2c_driver(lan9303_i2c_driver); |
| 110 | |
| 111 | MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>"); |
| 112 | MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in I2C managed mode"); |
| 113 | MODULE_LICENSE("GPL v2"); |